Mi-T-M HG Series Owner's manual

Operator's Manual 1

OPERATING INSTRUCTIONS FOR

HG-SERIES

HOT WATER PRESSURE WASHERS

- NATURAL GAS

- L.P. - GAS (VAPOR ONLY)

CAUTION

RISK OF INJURY!

READ MANUAL BEFORE OPERATING!

This manual is an important part of the

pressure washer and must

remain with the unit when you sell it!

®

C US

201473

2 Operator's Manual

TABLE OF CONTENTS

INTRODUCTION ................................................................................................................................................3

IMPORTANT SAFETY WARNINGS ................................................................................................................4-9

RISK OF EXPLOSION OR FIRE ..................................................................................................... 4

RISK OF ASPHYXIATION ...............................................................................................................5

RISK OF ELECTROCUTION OR ELECTRICAL SHOCK ...............................................................6

RISK OF INJECTION OR SEVERE CUTTING INJURY .................................................................7

RISK OF BURNS .............................................................................................................................8

RISK OF BURSTING .......................................................................................................................8

RISK FROM MOVING PARTS ........................................................................................................8

RISK OF BODILY INJURY ..............................................................................................................9

FEATURES .................................................................................................................................................. 10-11

INSTALLATION ...........................................................................................................................................12-17

LOCATION AND PLACEMENT .....................................................................................................12

ELECTRICAL .................................................................................................................................12

GAS PIPING .................................................................................................................................. 13

VENTILATION ...............................................................................................................................14

WATER SUPPLY ...........................................................................................................................15

HIGH PRESSURE CONNECTION ................................................................................................15

INSPECTING AND VERIFYING CONDITIONS ............................................................................16

PRE-OPERATION CHECKLIST ....................................................................................................17

PREPARATION ...........................................................................................................................................18-20

ATTIRE ..........................................................................................................................................18

PRE-START ...................................................................................................................................18

UNLOADER ...................................................................................................................................18

QUICK-CONNECT NOZZLES .......................................................................................................19

NOZZLE CONNECTION ...............................................................................................................19

DUAL LANCE ASSEMBLY WITH ADJUSTABLE PRESSURE ......................................................20

PRE-START SAFETY INSPECTION .............................................................................................20

OPERATING INSTRUCTIONS .......................................................................................................................................22-24

FLUSHING THE SYSTEM ............................................................................................................22

COLD WATER OPERATION .........................................................................................................22

HOT WATER OPERATION ............................................................................................................23

CLEANING WITH DETERGENTS ................................................................................................23

SHUTDOWN .................................................................................................................................24

OPTIONS ......................................................................................................................................24

MAINTENANCE ..........................................................................................................................................25-27

PREVENTIVE MAINTENANCE ....................................................................................................25

DELIME COIL ................................................................................................................................ 26

WINTERIZING ............................................................................................................................... 27

MAINTENANCE CHARTS ...............................................................................................................................28

TROUBLESHOOTING ................................................................................................................................29-30

STATEMENT OF WARRANTY ......................................................................................................................... 31

NOTES ......................................................................................................................................................... 32-33

NATIONAL CODES:

ANSI Z223.1 (NFPA NO. 54) NATIONAL FUEL GAS CODE.

NFPA NO. 70 (NEC) NATIONAL ELECTRICAL CODE.

CSA B149.1 GAS INSTALLATION CODE.

CSA C22.1 CANADIAN ELECTRICAL CODE PART 1.

WARNING: This product can expose you to

chemicals including carbon monoxide, which is

known to the State of California to cause birth

defects or other reproductive harm. For more

information go to www.P65Warnings.ca.gov

WARNING

WARNING: This product can expose you to

chemicals including Lead, which is known to

the State of California to cause cancer and birth

defects or other reproductive harm. For more

information go to www.P65Warnings.ca.gov

WARNING

Operator's Manual 3

INTRODUCTION

Congratulations on the purchase of your new HG-SERIES pressure washer! You can be assured your pressure washer

was constructed and designed with quality and performance in mind. Each component has been rigorously tested to

ensure the highest level of acceptance.

This operator's manual was compiled for your benet. By reading and following the simple safety, installation, operation,

maintenance and troubleshooting steps described in this manual, you will receive years of trouble free operation from

your new pressure washer. The contents of this manual are based on the latest product information available at the time

of publication. Manufacturer reserves the right to make changes in price, color, materials, equipment, specications or

models at any time without notice.

! IMPORTANT !

These paragraphs are surrounded by a "SAFETY ALERT BOX." This box is used to designate and

emphasize Safety Warnings that must be followed when operating this pressure washer.

Accompanying the Safety Warnings are "signal words" which designate the degree or level

of hazard seriousness. The "signal words" used in this manual are as follows:

DANGER: Indicates an imminently hazardous situation which, if not avoided, WILL

result in death or serious injury.

WARNING: Indicates a potentially hazardous situation which, if not avoided, COULD

result in death or serious injury.

CAUTION: Indicates a potentially hazardous situation which, if not avoided MAY

result in minor or moderate injury.

The symbols set to the left of this paragraph are "Safety Alert Symbols." These symbols

are used to call attention to items or procedures that could be dangerous to you or other

persons using this equipment.

ALWAYS PROVIDE A COPY OF THIS MANUAL TO ANYONE USING THIS EQUIPMENT. READ

ALL INSTRUCTIONS BEFORE OPERATING THIS PRESSURE WASHER AND ESPECIALLY

POINT OUT THE "SAFETY WARNINGS" TO PREVENT THE POSSIBILITY OF PERSONAL

INJURY TO THE OPERATOR.

Once the unit has been removed from the box, immediately write in the serial number of your unit in the space provided

below.

SERIAL NUMBER_________________________________

Inspect for signs of obvious or concealed freight damage. If damage does exist, le a claim with the transportation

company immediately. Be sure that all damaged parts are replaced and that the mechanical and electrical problems are

corrected prior to operation of the unit. If you require service, contact Customer Service Representative.

CUSTOMER SERVICE

CALL OUR TOLL-FREE NUMBER

for the Sales or Service Center nearest you!

800-553-9053

Please have the following information available for all service calls:

1. Model Number

2. Serial Number

3. Date and Place of Purchase

4 Operator's Manual

POTENTIAL CONSEQUENCE

PREVENTION

SAFETY WARNINGS

WARNING: When using this product, basic precautions should always be observed, including the following:

READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING PRESSURE WASHER

HAZARD

RISK OF

EXPLOSION OR FIRE

Serious injury or death may

occur from normal sparks in the

multiple ignition sources.

If you smell gas, extinguish any open ame

and test all joints with a soap solution. If the

odor persists, turn off gas supply and call for

service.

L.P.-Gas is heavier than air and will gravitate

to the oor. Always provide adequate oor

space and ventilation with L.P.-Gas systems

and sniff oor area for gas before operating.

Do not operate unit if smell exists.

Never leave operating machine unattended.

When servicing this machine, be especially

careful to properly shut off gas supply.

Install the pressure washer where open ame

or torch is permitted.

Always operate pressure washer in a well

ventilated area free of ammable vapors,

combustible materials including dust or

gases.

Do not allow lint or dust to collect in burner

area.

Do not use this pressure washer to spray

ammable liquids! Flammable liquids can

create fumes which can ignite.

This pressure washer has multiple safety

devices which should never be altered,

modied, removed or made inoperative. If

a device fails, replace immediately with only

genuine manufacturer replacement part.

Serious injury or death may

occur if system safety's are not

properly maintained.

Serious injury or death may

occur from gas leaks.

Serious injury or death may

occur from improper installation.

Installation of this unit including all gas piping

must comply with all local, state and national

codes. (Standards to be followed include the

National Fuel Gas Code ANSI Z223.1/NFPA

No. 54. In Canada; Refer to the CSA B149.1

Gas Installation Code).

Use appropriate fuel (natural gas or L.P.-Gas

Vapor) for the machine you are using.

Do not connect gas lines to the pressure

washer before testing gas piping pressure or

there may be damage to the gas valve.

Do not adjust gas pressure above recom-

mended levels. Excessive pressure may

cause damage to the valve.

Liquid propane models are designed to run

on vapor propane fuel. Do not use liquid

fuel.

Do not replace or rell L.P.-Gas tank while unit

is running.

Operator's Manual 5

POTENTIAL CONSEQUENCE

PREVENTION

HAZARD

Serious injury or death may occur

from inhaling burner exhaust or

dangerous vapors.

Installation of this unit including the

ventilation of the combustion gases must

comply with all local, state and national

codes. (Standards to be followed include

the National Fuel Gas Code ANSI Z223.1/

NFPA No. 54. In Canada; Refer to the CSA

B149.1 Gas Installation Code).

Always make certain there is adequate

ventilation (fresh outside air) for breathing

and combustion. This will prevent the

buildup of dangerous carbon monoxide

gases. Beware of poorly ventilated areas,

or areas with exhaust fans which can

cause poor air exchange.

If you smell gas, shut off the gas supply to

the appliance, extinguish any open ame,

and test all joints with a soap solution. If

the odor persists, call you gas supplier

immediately.

Follow all safety instructions provided with

the materials you are spraying. Use of a

respirator may be required when working

with some materials. Do not use this

pressure washer to dispense hazardous

materials.

RISK OF ASPHYXIATION

SAFETY WARNINGS

READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING PRESSURE WASHER

6 Operator's Manual

POTENTIAL CONSEQUENCE

PREVENTION

HAZARD

RISK OF

ELECTROCUTION

OR

ELECTRIC SHOCK

Serious injury or death could occur if

the pressure washer is not properly

grounded. Your pressure washer

is powered by electricity and may

cause electric shock or electrocution

if not used properly.

Installation of this unit including all

electrical connections must comply

with all local, state and national codes.

(Standards to be followed include NFPA

No. 70/NEC National Electrical Code.

In Canada; Refer to the CSA C22.1

Canadian Electrical Code Part 1)

This unit must be connected to a

grounded, permanent wiring system; or

an equipment-grounding conductor must

be run with the circuit conductors and

connected to the equipment-grounding

lead on the unit.

Make sure the pressure washer is

connected to a properly grounded source

which provides correct voltage and

adequate fuse protection. Disconnect

from power source when not in use or

when making repairs.

Do not attempt to light the pilot manually

as the electronic spark ignition lights the

pilot automatically.

Never operate pressure washer with

electrical enclosures open, removed or

damaged.

Do not touch machine while standing in

water or with wet hands. Never let the

electrical supply or any connections lay

in the water.

DO NOT direct spray on or into electrical

installations of any kind! This includes

electrical outlets, light bulbs, fuse boxes,

transformers, the unit itself, etc.

DO NOT allow metal components of the

pressure washer to come in contact with

live electrical components.

Any electrical wiring or repairs performed

on this pressure washer should be

done by authorized service personnel

in accordance with local and national

electrical codes.

Before opening any electrical enclosure,

always shut off the pressure washer,

relieve pressure and disconnect the

pressure washer from the power source.

Allow pressure washer to cool down.

Never assume the pressure washer is

safe to work on just because it is not

operating. It could restart at any time!

Electrical shock may occur if

pressure washer is not operated

properly.

Serious injury or death may occur

from contact with electricity.

Serious injury or death may occur if

electrical repairs are attempted by

unqualied persons.

Serious injury or death could result

from improper installation.

SAFETY WARNINGS

READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING PRESSURE WASHER

Operator's Manual 7

Serious injury or death could

occur from high pressure spray

penetrating the skin.

Keep clear of nozzle and spray! Never put

your hand, ngers or body directly over the

spray nozzle.

Never point the high pressure discharge

stream at persons.

This equipment is to be used only by

trained operators.

Always keep operating area clear of all

persons.

To reduce the risk of injury, close

supervision is necessary when using this

equipment near children. DO NOT allow

children to operate this unit.

SEEK EMERGENCY MEDICAL CARE if

the spray appears to have penetrated the

skin! DO NOT TREAT AS A SIMPLE CUT!

Be prepared to tell a physician exactly what

kind of cleaning agents you were using

by reading the Material Safety Data Sheet

(MSDS) provided with your detergent.

High pressure hoses should be inspected

daily for signs of wear. If evidence of

failure exists, promptly replace all suspect

hoses to prevent the possibility of injury

from the high pressure spray. If a hose or

tting is leaking, NEVER PLACE YOUR

HAND DIRECTLY ON THE LEAK.

Before using pressure washer, or when

quick connecting high pressure hoses and

spray nozzles, be certain the "collar" on the

female quick connect is locked securely to

prevent accidental discharge and that all

quick coupler ttings are secure.

NEVER operate the gun with the trigger

wired in the open position. To prevent

accidental discharge, the trigger gun

should be securely locked when not in use.

Before removing the spray nozzle or

servicing the unit, ALWAYS shut off the

unit and trigger the gun to release trapped

pressure. (Even after you shut off the

unit, there is high pressure water left in the

pump, hose and gun until you release it by

triggering the gun.)

POTENTIAL CONSEQUENCE

PREVENTION

HAZARD

SAFETY WARNINGS

READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING PRESSURE WASHER

RISK OF INJECTION

OR

SEVERE CUTTING INJURY

8 Operator's Manual

RISK OF BURNS

RISK OF BURSTING

RISK FROM MOVING PARTS

Serious injury may occur from

touching the heat exchanger or

vent piping. These areas can

remain hot for some time after the

pressure washer is shutdown.

Never make adjustments to the factory

set pressures.

If burner fails to shut off, turn off the gas

supply and contact your serviceman.

Never exceed manufacturers maximum

allowable pressure rating of attachments.

Do not allow any hoses to make contact

with the heat exchanger to prevent the

possibility of bursting. Avoid dragging the

hoses over abrasive surfaces such as

cement.

Use only manufacturer recommended

repair parts for your pressure washer.

In freezing temperatures, the unit must

always be warm enough to ensure there

is no ice formation in the unit. Do not

start the pressure washer without rst

allowing the unit to thaw.

Never allow any part of your body to

contact the heat exchanger or the vent

piping.

POTENTIAL CONSEQUENCE

PREVENTION

HAZARD

Serious injury may occur to the

operator from moving parts on the

pressure washer.

Do not operate the unit without all

protective covers in place or make any

adjustments without shutting off the

pressure washer, relieving pressure

and disconnecting the pressure washer

from the power source. Allow pressure

washer to cool down. Never assume

the pressure washer is safe to work on

just because it is not operating. It could

restart at any time!

Serious injury may occur from a

pressure washer malfunction or

exploding accessories if incorrect

system components, attachments

or accessories are used.

Serious injury or death may occur

if attempting to start the pressure

washer when the unit is frozen.

SAFETY WARNINGS

READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING PRESSURE WASHER

Operator's Manual 9

RISK OF BODILY INJURY

Serious injury or death may occur

from detergents contacting or

penetrating the skin.

SEEK EMERGENCY MEDICAL CARE if

the spray appears to have penetrated the

skin! DO NOT TREAT AS A SIMPLE CUT!

Be prepared to tell a physician exactly what

kind of cleaning agents you were using

by reading the Material Safety Data Sheet

(MSDS) provided with your detergent.

Never use any solvents or highly corrosive

detergents or acid type cleaners with this

pressure washer.

Protective equipment such as rubber suits,

gloves and respirators are advisable,

especially when using cleaning detergents.

Keep all detergents out of the reach of

children!

ALWAYS wear protective goggles when

operating the unit to shield the eyes from

ying debris and detergents.

DO NOT direct spray toward fragile

materials such as glass for shattering could

occur.

Stay alert-watch what you are doing. Do

not operate the unit when fatigued or under

the inuence of alcohol or drugs.

NEVER squeeze the trigger unless

securely braced.

DO NOT overreach or stand on unstable

support.

Wet surfaces can be slippery, wear

protective foot gear and keep good footing

and balance at all times.

NEVER trigger the gun while on a ladder

or roof.

ALWAYS hold on rmly to the gun/lance

assembly when starting and operating the

unit. Failure to do so can cause the lance

to fall and whip dangerously.

Know how to stop the pressure washer and

bleed pressures quickly. Be thoroughly

familiar with controls.

DO NOT leave pressurized unit

unattended. Shut off the pressure washer

and release trapped pressure before

leaving.

DO NOT operate the unit if you see any

oil or water leaks from the machine. DO

NOT resume operation until the unit has

been inspected and repaired by a qualied

serviceman.

Never make adjustments on the machine

while in operation.

Before servicing the unit: shut off the

pressure washer, relieve pressure and

disconnect the pressure washer from the

power source. Allow pressure washer to

cool down. Never assume the pressure

washer is safe to work on just because it is

not operating. It could restart at any time!

POTENTIAL CONSEQUENCE

PREVENTION

HAZARD

Serious injury can occur from

loose debris being propelled at a

high speed from the spray gun.

Injury may occur if the operator

loses his balance caused by the

thrust of water traveling through

the spray nozzle.

Injury may occur from the

pressure washer.

SAFETY WARNINGS

READ ALL SAFETY WARNINGS BEFORE INSTALLING AND USING PRESSURE WASHER

SAVE THESE INSTRUCTIONS

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Operator's Manual 11

FEATURES LISTING

1. Exhaust Outlet

2. Draft Diverter

3. Heat Exchanger

4. Pressure Switch

5. Pressure Trapping Unloader

6. Heat Dump Valve

7. High Pressure Pump

8. Gas Shut Off Valve

9. Gas Valve

10. High Pressure Outlet

11. Fork Truck Access

12. Nozzle Storage

13. Detergent Metering Valve

14. Pump Switch w/Indicator Light

15. Burner Switch w/Indicator Light

16. Detergent Strainer

17. Electrical Enclosure

18. Adjustable Thermostat

19. Electrical Junction Box

20. Float Tank w/Filter

21. Water Inlet

22. Gas Supply Inlet

23. Pressure Relief Valve

24. Decal- Nozzles

25. Decal- Electric Box Switches (Pump/Burner)

26. Decal- Operation

27. Decal- Detergent Valve

28. Decal- Warning/Caution

29. Decal- Warning: Risk of Injury/Exposed Pulleys

30. Decal- Warning: Hot Surfaces

31. Access Panel

32. High Pressure Hose

33. Trigger Gun

34. Trigger Safety Lock

35. Insulated Lance

36. Adjustable Pressure Dual Lance

37. High Pressure Nozzles

38. Pump Oil Drain

12 Operator's Manual

1. This unit should be installed indoors by a qualied serviceman in a non-

freezing, dry environment away from damaging winds and rain. If any part of

the unit becomes frozen, excessive pressure may build up in the unit which

could cause it to burst resulting in possible serious injury to the operator or

bystanders. Normal precautions should be taken so that excess moisture

does not reach the electrical controls or the power unit.

2. It should be placed in an area away from ammable or combustible material.

These types of material should be kept at least 20 feet away from the gas-

red units.

3. Avoid small areas and exhaust fans. Combustion becomes difcult and

carbon monoxide may result in these areas. Allow enough space for servicing.

Some codes will require certain distances from walls and ooring. Two feet

away from the walls should sufce.

4. This unit should only be placed on a level surface to ensure proper lubrication

for the water pump while operating. NEVER spray water directly on the

unit.

5. DO NOT place unit in an area:

a. where ammable gas vapors may be present.

b. with insufcient ventilation.

c. where there is evidence of oil or fuel leaks.

RISK OF EXPLOSION OR FIRE!

DO NOT PLACE UNIT IN AN

AREA WHERE FLAMMABLE

GAS VAPORS MAY BE PRESENT.

A SPARK COULD CAUSE AN

EXPLOSION OR FIRE!

RISK OF UNIT BURSTING!

DO NOT LOCATE THE UNIT IN

FREEZING ENVIRONMENTS!

RISK OF ASPHYXIATION!

USE THIS PRODUCT ONLY IN

WELL VENTILATED AREAS! THE

EXHAUST CONTAINS CARBON

MONOXIDE, A POISONOUS,

ODORLESS AND INVISIBLE

GAS. BREATHING THIS GAS

CAN CAUSE SERIOUS INJURY,

ILLNESS & POSSIBLE DEATH.

INSTALLATION

ELECTRICAL:

1. Installation of this unit should be performed by a qualied serviceman and

all electrical installation must conform to all local, state and national codes,

including NFPA No. 70 (NEC) National Electrical Code. In Canada; Refer

to the CSA C22.1 Canadian Electrical Code Part 1.

2. This unit comes to you with the wires terminating in a junction box inside

the cabinet. You must supply the incoming power source.

3. Ensure electrical supply is identical to the specications listed on the pressure

washer data plate.

4. Ensure all connections are secure and covers are replaced.

LOCATION AND PLACEMENT:

RISK OF ELECTROCUTION!

THIS UNIT MUST BE CONNECTED

TO A PROPERLY GROUNDED

OUTLET.

DANGER

WARNING

Operator's Manual 13

INSTALLATION

1. Installation of this unit should be performed by a qualied serviceman

and all gas piping must conform to all local, state and national codes,

including the National Fuel Gas Code ANSI Z223.1/NFPA No. 54. In

Canada; Refer to the CSA B149.1 Gas Installation Code.

2. Turn off gas and electricity before starting installation or service.

3. The gas line to the burner should be a separate supply from the meter

because of the burner demand. Use new pipe and locate it with future

service in mind. Use only black pipe or tubing suitable for gas applications

and make sure the pipe is free from cutting burrs and defects. Use joint

compound (not teon tape) only on male ttings, leaving clean the rst

two threads to be engaged. DO NOT use compound on female threads

where it can be pushed into the line and cause gas valve failure.

RECOMMENDED PIPE SIZES FOR GAS SUPPLY LINE

(Refer to illustration #1 for the following:)

4. Following the gas line from the meter or regulator, before the machine,

install a manual main shut-off valve.

5. Down stream from the main shut-off valve, a tee and drip leg should be

installed to catch debris and moisture. This leg must be capped.

6. A 4" nipple and gas regulator should be installed off of the tee. This

regulator should control gas pressure down to 3"-12" W.C.P.

7. On the other side of the regulator, another 4" nipple and union should

be installed.

8. After the union and before the gas valve on the unit, a manual shut-off

valve should be installed with a 1/8" NPT plugged tapping accessible for

test gauge connection between it and the union.

GAS PIPING:

ILLUSTRATION #1

GAS SUPPLY PIPING

NATURAL GAS L.P.-GAS

DISTANCE TO UNIT

FROM REGULATOR

PIPE SIZE DISTANCE TO UNIT

FROM REGULATOR

PIPE SIZE

0-50 Feet 1-1/2" 1PS 0-50 Feet 1" 1PS

50-100 Feet 2" 1PS 50-100 Feet 1-1/2" 1PS

100-200 Feet 2-1/2" 1PS 100-200 Feet 1-3/4" 1PS

14 Operator's Manual

INSTALLATION

VENTILATION:

1. Installation of this unit in an indoor or in an enclosed area should be performed

by a qualied serviceman and all venting must conform to all local, state and

national codes, including the National Fuel Gas Code ANSI Z223.1/NFPA

No. 54. In Canada; Refer to the CSA B149.1 Gas Installation Code. The

burner exhaust should be stacked to the outside atmosphere and a draft

diverter should be installed as well.

NOTE: There should be no more than 6500 BTU per square inch of ue.

2. A draft diverter must be installed above the exhaust outlet. This diverter

breaks the chimney effect and enhances the draft through the burner for a

more efcient ame. It also helps prevent cold air downdrafts from freezing

the heat exchanger. (See illustration #2)

3. Install the recommended ue pipe per local, state and national codes, including

the National Fuel Gas Code ANSI Z223.1/NFPA No. 54. In Canada; Refer

to the CSA B149.1 Gas Installation Code. If the ue pipe exceeds 10 feet in

length or contains more than two elbows, the natural draft may be eliminated

and the burner will not ignite. In cases of this nature, a certied power vent*

may be used to remove exhaust gases from the building. Exhaust may be

vented out roof vents as well as side wall horizontal vent systems.

DO NOT install a movable ue pipe damper.

*Vent must meet all necessary local requirements and be installed according

to instruction manual and all applicable codes by a qualied technician.

4. If the unit is being installed in an enclosed room, provide adequate air for

combustion by installing openings to the room near the ceiling for ventilation

and near the oor for burner combustion. These openings should be sized

using one square inch for each 1000 BTU per inch of the machine.

Example: A pressure washer with a 400,000 BTU input requires openings of 400

square inch or approximately 3 feet x 1 foot. (See illustration #3).

5. If the building in which the unit is being installed seems unusually tightly

constructed, it is recommended that air intakes extending to the outside of the

building be employed to supply combustion air. End the intakes outside the

building with a downward opening to protect these intakes from snow and/or

rain. Include a mesh screen no smaller than 1/4" over the opening.

ILLUSTRATION #2

DRAFT DIVERTER

ILLUSTRATION #3

ENCLOSED ROOM VENTILATION

Operator's Manual 15

INSTALLATION

HIGH PRESSURE CONNECTION:

Connect the high pressure discharge hose by connecting one end to the

pressure washer and the other end to the gun assembly. Make certain the

quick connects are securely locked together. (See illustration #5 and #6)

ILLUSTRATION #5

HIGH PRESSURE HOSE CONNECTION

ILLUSTRATION #6

QUICK CONNECT

ILLUSTRATION #4

HOSE CONNECTION

WATER SUPPLY:

1. Select a water supply hose which is a quality grade of garden hose

measuring at least 3/4" ID and no longer than 50'. (See illustration #4)

2. Connect one end of the water supply hose to the water inlet of the unit.

Connect the other end of the hose to your pressurized water supply.

NOTE: If there is a high mineral content in your water, it is recommended

that a water softener be used to prevent the possibility of excessive

scale buildup inside the heat exchanger coil.

3. Be certain all connections are securely tightened.

a. Water supply hose to the Water Inlet on the unit.

b. Water supply hose to the Pressurized Water Supply.

4. Follow the incoming water requirements listed below:

a. Water pressure must be between a minimum of 20 pounds per

square inch (PSI) and a maximum of 65 PSI.

b. Incoming GPM must be approximately one gallon more than

the outgoing GPM stated on the pressure washer I.D. Plate.

(You can check GPM by timing how long it takes to ll a 5 gallon

container.)

c. Incoming water temperature must not exceed 125°F. Excessive

pump damage may result if the water temperature exceeds this

acceptable level.

NOTE: If the water supply is inadequate or the hose is kinked, the unit will

run rough and the burner will not re.

5. Never allow the unit to operate without the incoming water line attached

and the water supply completely turned on.

16 Operator's Manual

ILLUSTRATION #7

MAKING A MANOMETER

INSTALLATION

INSPECTING AND VERIFYING CONDITIONS:

1. Check to ensure the building is not weakened by the installation of this

unit and make sure the piping is secure.

2. Check gas pressure and check all gas piping for leaks.

a. Ensure all gas connections are made and close the valve before the

gas valve on the machine.

b. Immediately after opening the main valve, coat all piping and connections

with soapy water to check for gas leaks. Defective piping and ttings

should be replaced immediately.

c. After the meter and all piping have been checked for leaks, purge the

air from the system by removing the test tapping plug and bleeding the

line into a well-ventilated area to protect against potential re hazard.

d. If a commercial manometer is not available, make one by using a clear

tube about 1/2 full of water and shape it like a U. (See illustration #7)

With the main shut-off valve closed, connect a hose barb tting into the

test tapping, connect the hose and mark the water level as shown.

e. Turn on the main gas valve and check the water column level by mea-

suring the distance the two water levels rose and dropped from starting

level. This must not exceed 14" W.C. (See illustration #8) Start the

unit and check pressure with burner running. The gas pressure at this

point should be 4-7" W.C. for N.G. and 8-12" W.C. for L.P.-Gas.

f. Turn off the main shut-off valve, remove test tting and replace plug.

g. Using a 3/16" hex key wrench, remove plug from test port on gas valve

inside the pressure washer (see illustration #9) and connect your ma-

nometer or test tube.

h. Turn on manual shut-off valve and gas regulating valve. Operate the

unit so the burner runs and check the manifold pressure. The gas pres-

sure at this point should be 3.5"-4" W.C. for N.G. and 8.5"-9.5" W.C. for

L.P.-Gas.

i. Shut off the unit and manual shut-off valve, remove manometer or test

tube and replace plug.

3. Adjusting the gas regulator on the gas valve normally IS NOT necessary

since it is preset at the factory; however, if it is necessary, follow these

instructions:

a. Using a 3/16" hex key wrench, remove plug from test port on gas valve

inside the pressure washer (see illustration #9) and connect your ma-

nometer or test tube.

b. While running the burner, use the screwdriver to adjust the gas pressure

(clockwise to increase and counterclockwise to decrease).

c. When nished, shut off the unit and manual shut-off valve, replace the

adjustment cap, remove manometer or test tube and replace plug.

ILLUSTRATION #8

MEASURING WATER COLUMN

ILLUSTRATION #9

ADJUSTING GAS REGULATOR

Operator's Manual 17

INSTALLATION

QUESTIONS

CODES:

1. Does the electrical supply meet respected codes?

2. Does all gas supply piping meet respected codes?

3. Does the ventilation system meet respected codes?

LOCATION:

1. Is the unit installed indoors on a level surface in a dry area protected

from excessive wind, rain and moisture?

2. Is the unit located away from flammable and combustible

material?

3. Is the unit located in a large enough area for adequate air ow?

ELECTRICAL:

1. Is the unit properly grounded?

2. Do all electrical components used meet requirements shown on

the unit I.D. Plate and is the voltage correct?

GAS SUPPLY:

1. Is the proper fuel type (N.G. or L.P.-Gas) being used for your

pressure washer?

2. Does the gas supply meet the demand of the BTU rating of the

burner?

3. Has the proper gas regulator been installed for the proper pressure

and ow?

4. Is all piping the right size and have all gas connections been checked

for leaks?

5. Is the gas valve completely open?

6. Is the incoming gas pressure 3"-7" W.C. for N.G. and 8"-12" W.C.

for L.P.-Gas?

7. Are the propane tanks (if applicable) employed large enough to

avoid freezing according to the unit's rating?

VENTILATION:

1. Are the correct ue pipe and draft hood sizes employed?

2. Is there adequate ventilation for burner combustion?

3. Is the unit properly vented to allow adequate air ow?

4. Is exhaust stacked to outside atmosphere?

GENERAL:

1. Have all operators using this unit read the Installation and Operator's

Manual and understood all safety warnings?

2. Has the unit been installed by qualied service people who followed

the Installation and Operator's Manual instructions?

3. Is there ample water supply?

YES NO

PRE-OPERATION CHECKLIST:

Before starting the unit, answer the questions in this checklist:

IF NO WAS MARKED FOR ANY OF THESE QUESTIONS, CORRECT THE SITUATION

BEFORE OPERATING THIS GAS-FIRED UNIT.

18 Operator's Manual

PREPARATION

ATTIRE:

Proper attire is essential to your safety. It is advised to utilize whatever means

necessary to protect eyes, ears, and skin. Additional safety attire (such as

respiratory mask) may be required when using detergent cleaning agents with

this pressure washer.

PRE-START:

1. Before lighting, smell all around the machine for gas. Especially, sniff the

oor area because some gas is heavier than air and will settle on the oor.

Do not operate unit if smell exists. Leave the location and contact a qualied

serviceman.

2. Check to ensure the voltage is on.

3. Pump oil level should be checked before each use. Check the oil level with

the dipstick on top of the pump crankcase. (See illustration #10.) The proper

oil level should be at the notch on the dipstick. If the level appears low, use

pump oil SAE20 or 30 non-detergent.

ILLUSTRATION #10

PUMP-REAR OIL GAUGE

DANGER

RISK OF EXPLOSION OR FIRE!

UNLOADER:

The unloader has been preset at the factory and should only be adjusted by a

trained serviceman.

SMELL FOR GAS BEFORE

STARTING UNIT. ALWAYS SNIFF

AREA AROUND THE MACHINE

FOR A GAS SMELL. BE SURE TO

SNIFF FLOOR AREA, SINCE SOME

GAS IS HEAVIER THAN AIR AND

WILL SETTLE ON THE FLOOR.

IF YOU SMELL GAS:

•DO NOT START UNIT.

•DO NOT OPERATE ANY

ELECTRICAL SWITCH.

•DO NOT LIGHT ANY

APPLIANCE.

•DO NOT USE ANY PHONE IN

THE ROOM OR AREA.

•LEAVE, GO TO ANOTHER

LOCATION AND USE A PHONE

TO CALL YOUR GAS

SUPPLIER.

•FOLLOW THE GAS SUPPLIER'S

INSTRUCTIONS.

•IF YOU CANNOT REACH YOUR

GAS SUPPLIER, CALL THE FIRE

DEPARTMENT.

Operator's Manual 19

PREPARATION

QUICK-CONNECT NOZZLES:

Various nozzles may be quick connected into the end of the adjustable pressure

dual lance to change the spray pattern or use the detergent feature. When

using Quick- connects (Q.C.), be certain the connection is securely locked.

(See illustration #11). If not, the high pressure water may shoot the nozzle

from the lance, causing severe injury or serious damage. To determine

spray fan, (see illustration #12) refer to the actual number stamped on the

nozzle. The rst two digits indicate the spray fan in degrees, i.e., 00=0°,

15=15°, 25=25°, 40=40°.

1. The 0° nozzle (RED): This is a blasting nozzle. It delivers a very concentrated

stream of water. Be cautious when using the straight narrow stream. It is

not recommended for use on painted or wood surfaces or items attached

with adhesive backings. Uses: Removing weeds from sidewalk cracks,

stubborn stains from concrete, masonry, aluminum and steel, caked mud

from equipment, and cleaning lawn mower undersides.

2. The 15° nozzle (YELLOW): This is a chiseling nozzle. The spray should

be directed at a 45° angle to the surface and used like a scraper to

remove paint, grease and dirt. Uses: Surface preparation (removing

mildew stains and paint chips).

3. The 25° nozzle (GREEN):

a. This is a ushing nozzle. This pattern is best suited for ushing

dirt, mud, and grime. Uses: Wet sweeping leaves from walk,

curbs and driveways, cleaning stable oors, washing swimmin

pool bottoms, degreasing engines.

b. On units with steam option, this nozzle is used for 250°F Wet

Steam operation. This nozzle is sized for operation with the

unloader and steam valve (where applicable) to provide high

pressure wet steam. Replacement of this nozzle with an improp-

erly sized nozzle may cause operational problems with the

machine.

4. The 40° nozzle (WHITE): This is a wash nozzle. This wide spray pattern

disperses the water pressure over a large area and is recommended

for moderate washing. Uses: Washing down aluminum siding, cleaning

windows, washing vehicles, spraying sidewalks, driveways, and

patios.

ILLUSTRATION #11

QUICK CONNECT

ILLUSTRATION #12

Q.C. NOZZLES

1. Ensure the trigger gun is locked in the OFF position. (See illustration

#13)

2. The quick-connect nozzle should be disconnected from the adjustable

pressure dual lance at this time. As shown in illustration #14, retract the

locking ring on the quick-connect tting to remove the nozzle.

ILLUSTRATION #14

NOZZLE CONNECTION

NOZZLE CONNECTION:

WARNING

RISK OF INJECTION CAUSING

SEVERE INJURY!

THE TRIGGER GUN SHOULD

ALWAYS BE LOCKED IN THE OFF

POSITION WHEN NOT IN USE!

NEVER LOOK DIRECTLY AT

THE NOZZLE UNLESS IT IS

DISCONNECTED FROM THE

TRIGGER GUN/DUAL LANCE

ASSEMBLY!

ILLUSTRATION #13

GUN LOCK

20 Operator's Manual

PREPARATION

1. This unit features a adjustable pressure dual lance with adjustable pressure

which allows the user to select a high or low pressure "fan" spray. Simply

rotate the adjustable grip on the dual lance to achieve the desired pressure

selection.

a. Selection of high pressure can be achieved by turning the adjustable

grip on the dual lance counterclockwise as shown in illustration #15.

b. Selection of low pressure can be achieved by turning the adjustable

grip on the dual lance clockwise as shown in illustration #15. If using

the detergent injector accessory, once the pressure is low enough, this

injector on the pressure washer will draw detergent into the system. A

water/detergent mixture exits from both the spray nozzle and detergent

nozzle.

1. Before starting the unit, perform the following procedures:

a. Check for gas smell. If a gas smell is detected, DO NOT START UNIT!

See "Risk of Explosion or Fire" warnings, pg. 4.

b. Check all hose connections to ensure they are securely tightened.

c. Inspect for system water and oil leaks.

d. Inspect high pressure hoses for kinking, cuts and leaks. If a cut or leak

is found, DO NOT USE HOSE! Replace hose before starting unit. See

"Risk of Injection" warnings, pg. 7. Be sure that all damaged parts are

replaced and that the mechanical problems are corrected prior to opera-

tion of the unit. If you require service, contact your Customer Service

Represenative.

ILLUSTRATION #15

DUAL LANCE

DUAL LANCE ASSEMBLY WITH ADJUSTABLE PRESSURE:

PRE-START INSPECTION PROCEDURES:

Operator's Manual 21

WARNING

THE FOLLOWING PAGES CONTAIN OPERATING AND

MAINTENANCE INSTRUCTIONS.

DO NOT ATTEMPT TO OPERATE THIS PRESSURE

WASHER UNTIL YOU HAVE READ AND UNDERSTOOD

ALL SAFETY PRECAUTIONS AND INSTRUCTIONS

LISTED IN THIS MANUAL. FOLLOW THE MAINTENACE

INSTRUCTIONS SPECIFIED IN THE MANUAL.

INCORRECT OPERATION OF THIS UNIT CAN CAUSE

SERIOUS INJURY!!

DO NOT ALTER OR MODIFY THIS EQUIPMENT

IN ANY MANNER!

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Mi-T-M HG Series Owner's manual

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